linux-kernel - [PATCH 4.14 163/173] ASoC: samsung: i2s: Fix error handling path in i2s_set

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Date:   Mon, 24 Sep 2018 13:53:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Mark Brown <broonie@...nel.org>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 4.14 163/173] ASoC: samsung: i2s: Fix error handling path in i2s_set_sysclk()

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe Jaillet <christophe.jaillet@...adoo.fr>

commit 6431a7e36652517df82855ee79c8240001812a55 upstream.

If 'clk_prepare_enable()' fails, we must 'put' the corresponding clock.
Othewise, there is a resource leak.

Fixes: f5c97c7b0438 ("ASoC: samsung: i2s: Handle return value of clk_prepare_enable.")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/samsung/i2s.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -552,8 +552,11 @@ static int i2s_set_sysclk(struct snd_soc
 			}
 
 			ret = clk_prepare_enable(i2s->op_clk);
-			if (ret)
+			if (ret) {
+				clk_put(i2s->op_clk);
+				i2s->op_clk = NULL;
 				goto err;
+			}
 			i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 
 			/* Over-ride the other's */